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authorLibravatar vnugent <public@vaughnnugent.com>2024-05-26 17:39:40 -0400
committerLibravatar vnugent <public@vaughnnugent.com>2024-05-26 17:39:40 -0400
commita8a6efb2319f739e5faae550561dc27d9dd1e88d (patch)
treefb24ccfb03e5eb57861182f89794992cfe02bb6e /src/crypto/impl/bcrypt.c
parent72e1b7be4031e2fd4d258fcf434ad049c0029201 (diff)
chore: Update libs, reorder files, internalize private headers
Diffstat (limited to 'src/crypto/impl/bcrypt.c')
-rw-r--r--src/crypto/impl/bcrypt.c263
1 files changed, 0 insertions, 263 deletions
diff --git a/src/crypto/impl/bcrypt.c b/src/crypto/impl/bcrypt.c
deleted file mode 100644
index 9b01cac..0000000
--- a/src/crypto/impl/bcrypt.c
+++ /dev/null
@@ -1,263 +0,0 @@
-/*
-* Copyright (c) 2024 Vaughn Nugent
-*
-* Package: noscrypt
-* File: impl/bcrypt.c
-*
-* This library is free software; you can redistribute it and/or
-* modify it under the terms of the GNU Lesser General Public License
-* as published by the Free Software Foundation; either version 2.1
-* of the License, or (at your option) any later version.
-*
-* This library is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-* Lesser General Public License for more details.
-*
-* You should have received a copy of the GNU Lesser General Public License
-* along with noscrypt. If not, see http://www.gnu.org/licenses/.
-*/
-
-
-/*
-* This file provides as many fallback implementations on Windows plaforms
-* as possible using the bcrypt library. This file should be included behind
-* other libarry implementations, as it is a fallback.
-*/
-
-#ifdef _NC_IS_WINDOWS
-
-#define WIN32_LEAN_AND_MEAN
-#include <Windows.h>
-#include <bcrypt.h>
-
-#include "nc-util.h"
-#include "hkdf.h"
-
-#define IF_BC_FAIL(x) if(!BCRYPT_SUCCESS(x))
-#define BC_FAIL(x) if(!BCRYPT_SUCCESS(x)) return CSTATUS_FAIL;
-
-struct _bcrypt_ctx
-{
- BCRYPT_ALG_HANDLE hAlg;
- BCRYPT_HASH_HANDLE hHash;
-};
-
-_IMPLSTB NTSTATUS _bcInitSha256(struct _bcrypt_ctx* ctx, DWORD flags)
-{
- NTSTATUS result;
-
- result = BCryptOpenAlgorithmProvider(
- &ctx->hAlg,
- BCRYPT_SHA256_ALGORITHM,
- NULL,
- flags
- );
-
- /*
- * If operation failed, ensure the algorithm handle is null
- * to make free code easier to cleanup
- */
- if (!BCRYPT_SUCCESS(result))
- {
- ctx->hAlg = NULL;
- }
-
- return result;
-}
-
-_IMPLSTB NTSTATUS _bcCreateHmac(struct _bcrypt_ctx* ctx, const cspan_t* key)
-{
- /*
- * NOTE:
- * I am not explicitly managing the update object buffer. By setting
- * the update object to NULL, and length to 0, the buffer will be
- * managed by the bcrypt library.
- *
- * See: https://learn.microsoft.com/en-us/windows/win32/api/bcrypt/nf-bcrypt-bcryptcreatehash
- */
-
- return BCryptCreateHash(
- ctx->hAlg,
- &ctx->hHash,
- NULL,
- 0,
- (uint8_t*)key->data,
- key->size,
- BCRYPT_HASH_REUSABLE_FLAG /* Enable reusable for expand function */
- );
-}
-
-_IMPLSTB NTSTATUS _bcCreate(struct _bcrypt_ctx* ctx)
-{
- cspan_t key;
-
- /* Zero out key span for 0 size and NULL data ptr */
- SecureZeroMemory(&key, sizeof(cspan_t));
-
- return _bcCreateHmac(ctx, &key);
-}
-
-_IMPLSTB NTSTATUS _bcHashDataRaw(const struct _bcrypt_ctx* ctx, const uint8_t* data, uint32_t len)
-{
- return BCryptHashData(ctx->hHash, (uint8_t*)data, len, 0);
-}
-
-_IMPLSTB NTSTATUS _bcHashData(const struct _bcrypt_ctx* ctx, const cspan_t* data)
-{
- return _bcHashDataRaw(ctx, data->data, data->size);
-}
-
-_IMPLSTB NTSTATUS _bcFinishHash(const struct _bcrypt_ctx* ctx, sha256_t digestOut32)
-{
- return BCryptFinishHash(ctx->hHash, digestOut32, sizeof(sha256_t), 0);
-}
-
-_IMPLSTB void _bcDestroyCtx(struct _bcrypt_ctx* ctx)
-{
- /* Free the update memory if it was allocated */
- if(ctx->hHash) BCryptDestroyHash(ctx->hHash);
-
- /* Close the algorithm provider */
- if (ctx->hAlg) BCryptCloseAlgorithmProvider(ctx->hAlg, 0);
-
- ctx->hAlg = NULL;
- ctx->hHash = NULL;
-}
-
-#ifndef _IMPL_SECURE_ZERO_MEMSET
- /*
- * On Windows, we can use SecureZeroMemory
- * as platform zeroing function.
- *
- * NOTE:
- * SecureZeroMemory2 uses volitle function argument
- * pointers, which is a contested mehtod of compiler
- * optimization prevention. GNU seems to oppose this method
- *
- * https://learn.microsoft.com/en-us/windows/win32/memory/winbase-securezeromemory2
- */
- #define _IMPL_SECURE_ZERO_MEMSET SecureZeroMemory
-#endif /* !_IMPL_SECURE_ZERO_MEMSET */
-
-/*
-* Provide win32 fallback for sha256 digest if needed
-*/
-
-#ifndef _IMPL_CRYPTO_SHA256_DIGEST
-
- /* Export function fallack */
- #define _IMPL_CRYPTO_SHA256_DIGEST _bcrypt_sha256_digest
-
- _IMPLSTB cstatus_t _bcrypt_sha256_digest(const cspan_t* data, sha256_t digestOut32)
- {
- cstatus_t result;
- struct _bcrypt_ctx ctx;
-
- result = CSTATUS_FAIL; /* Start in fail state */
-
- IF_BC_FAIL(_bcInitSha256(&ctx, 0)) goto Exit;
-
- IF_BC_FAIL(_bcCreate(&ctx)) goto Exit;
-
- IF_BC_FAIL(_bcHashData(&ctx, data)) goto Exit;
-
- IF_BC_FAIL(_bcFinishHash(&ctx, digestOut32)) goto Exit;
-
- result = CSTATUS_OK; /* Hash operation completed, so set success */
-
- Exit:
-
- _bcDestroyCtx(&ctx);
-
- return result;
- }
-
-#endif /* !_IMPL_CRYPTO_SHA256_DIGEST */
-
-#ifndef _IMPL_CRYPTO_SHA256_HMAC
-
- /* Export function */
- #define _IMPL_CRYPTO_SHA256_HMAC _bcrypt_hmac_sha256
-
- _IMPLSTB cstatus_t _bcrypt_hmac_sha256(const cspan_t* key, const cspan_t* data, sha256_t hmacOut32)
- {
- cstatus_t result;
- struct _bcrypt_ctx ctx;
-
- result = CSTATUS_FAIL; /* Start in fail state */
-
- /* Init context with hmac flag set */
- IF_BC_FAIL(_bcInitSha256(&ctx, BCRYPT_ALG_HANDLE_HMAC_FLAG)) goto Exit;
-
- IF_BC_FAIL(_bcCreateHmac(&ctx, key)) goto Exit;
-
- IF_BC_FAIL(_bcHashData(&ctx, data)) goto Exit;
-
- IF_BC_FAIL(_bcFinishHash(&ctx, hmacOut32)) goto Exit;
-
- result = CSTATUS_OK; /* HMAC operation completed, so set success */
-
- Exit:
-
- _bcDestroyCtx(&ctx);
-
- return result;
- }
-
-#endif /* !_IMPL_CRYPTO_SHA256_HMAC */
-
-/*
-* Provide a fallback HKDF expand function using the
-* HMAC function as a base.
-*/
-
-#ifndef _IMPL_CRYPTO_SHA256_HKDF_EXPAND
-
- #define _IMPL_CRYPTO_SHA256_HKDF_EXPAND _bcrypt_fallback_hkdf_expand
-
- cstatus_t _bcrypt_hkdf_update(void* ctx, const cspan_t* data)
- {
- DEBUG_ASSERT(ctx != NULL)
-
- BC_FAIL(_bcHashData((struct _bcrypt_ctx*)ctx, data))
- return CSTATUS_OK;
- }
-
- cstatus_t _bcrypt_hkdf_finish(void* ctx, sha256_t hmacOut32)
- {
- DEBUG_ASSERT(ctx != NULL)
-
- BC_FAIL(_bcFinishHash((struct _bcrypt_ctx*)ctx, hmacOut32))
- return CSTATUS_OK;
- }
-
- _IMPLSTB cstatus_t _bcrypt_fallback_hkdf_expand(const cspan_t* prk, const cspan_t* info, span_t* okm)
- {
- cstatus_t result;
- struct _bcrypt_ctx ctx;
- struct nc_hkdf_fn_cb_struct handler;
-
- handler.update = _bcrypt_hkdf_update;
- handler.finish = _bcrypt_hkdf_finish;
-
- /* Init bcrypt */
- BC_FAIL(_bcInitSha256(&ctx, BCRYPT_ALG_HANDLE_HMAC_FLAG))
-
- BC_FAIL(_bcCreateHmac(&ctx, prk))
-
- /*
- * NOTE! Hmac reusable flag must be set to allow for multiple
- * calls to the finish function without losing the context.
- */
-
- result = hkdfExpandProcess(&handler, &ctx, info, okm);
-
- _bcDestroyCtx(&ctx);
-
- return result;
- }
-
-#endif /* !_IMPL_CRYPTO_SHA256_HKDF_EXPAND */
-
-#endif /* _NC_IS_WINDOWS */ \ No newline at end of file